I could see Apple implementing a Rosetta (emulator) solution if they really, really had no other choice. There are a lot of emulators used on desktops to run arm based applications and some are quite impressive. Not the best way but definitely doable in a pinch. I happen to agree with you though, they are "all in" on arm. To me on any mobile device, notebooks included, battery life is the biggest deal.
10/17/10 at 9:15pm